Pobzeb nplaum thiab cov qauv putty yog cov khoom yuav tsum muaj nyob rau hauv kev tsim kho kev lag luam. Lawv yog siv los khi cov pobzeb ceramic rau ntau qhov chaw, nrog rau cov phab ntsa thiab cov plag tsev. Ib qho tseem ceeb ntawm cov khoom no yog RDP polymer. RDP sawv cev rau Redispersible Polymer Powder, uas yog copolymer ntawm vinyl acetate thiab ethylene. Polymers ua lub luag haujlwm tseem ceeb hauv cov nplaum thiab cov txheej txheem putty thiab cuam tshuam rau ntau yam khoom, suav nrog adhesion, cohesion, durability thiab processability. Kab lus no yuav tham txog yam yuav tsum xav txog thaum xaiv qhov tsim nyog RDP polymer thiab nws qhov cuam tshuam rau cov nplais nplaum thiab cov txheej txheem putty.
1. Adhesion
Adhesion yog lub peev xwm ntawm cov khoom los lo rau ntau qhov chaw. Cov khoom nplaum ntawm RDP polymers nyob ntawm cov qauv tshuaj, qhov hnyav molecular thiab qib ntawm kev sib txuas ntawm cov polymer. Cov qauv tshuaj ntawm RDP polymer txiav txim siab hom ntawm qhov chaw nws sib xws. Piv txwv li, vinyl acetate tivthaiv ntawm cov polymer muaj siab adhesion rau cov tsis-polar nto xws li PVC thiab PE. Ethylene, ntawm qhov tod tes, muaj siab adhesion rau polar nto xws li pob zeb thiab ntoo.
Txhawm rau ua kom muaj zog adhesion, nws raug nquahu kom siv siab molecular hnyav RDP polymers. Ntau dua molecular hnyav polymers tsim muaj zog intermolecular rog, ua rau adhesion zoo dua. Qib ntawm kev sib txuas ntawm kev sib txuas cuam tshuam rau kev solubility ntawm RDP polymer thiab yog li nws cov khoom nplaum. Cov polymers uas muaj kev sib txuas siab heev yog cov soluble tsawg dua thiab muaj cov nplaum nplaum qis dua li cov khoom sib txuas sib txuas tsawg dua.
2. Kev sib koom tes
Cohesion yog hais txog lub peev xwm ntawm ib yam khoom los lo rau nws tus kheej. Lub cohesive zog ntawm RDP polymers muaj feem xyuam rau lub iav hloov kub (Tg) ntawm lub polymer. Lub Tg ntawm RDP polymer txiav txim siab qhov kub ntawm qhov uas cov polymer hloov ntawm cov roj hmab mus rau lub xeev iav. Polymers nrog Tg saum toj no chav tsev kub pom muaj kev sib koom ua ke zoo heev, thaum cov polymers nrog Tg hauv qab chav sov pom muaj kev sib txuam tsis zoo.
Rau kev sib koom ua ke zoo heev, nws raug nquahu kom siv RDP polymers nrog Tg siab dua chav tsev. Siab dua Tg polymers tsim muaj zog intermolecular rog, ua rau muaj kev sib raug zoo dua. Nws kuj tau pom zoo kom siv ntau dua molecular hnyav RDP polymers los txhim kho kev sib koom ua ke.
3. Durability
Durability yog ib qho cuab yeej tseem ceeb ntawm cov pobzeb nplaum thiab cov txheej txheem putty. Lub durability ntawm RDP polymers cuam tshuam los ntawm lawv cov tsis kam mus rau dej, tshav kub thiab UV degradation. Cov vinyl acetate tivthaiv ntawm RDP polymer yog rhiab heev rau hydrolysis, uas ua rau txo durability nyob rau hauv cov av noo.
Txhawm rau txhim kho lub zog, nws raug nquahu kom siv RDP polymers nrog cov ntsiab lus ethylene siab. Vinyl muaj cov dej zoo heev thiab cov dej noo tsis kam thiab yog li nws muaj zog dua. RDP polymers nrog cov ntsiab lus vinyl acetate tsawg kuj tuaj yeem ua kom muaj zog. Tsis tas li ntawd, RDP polymers nrog UV tsis kam yog pom zoo rau kev siv sab nrauv.
4. Kev ua tau zoo
Workability hais txog qhov yooj yim ntawm daim ntawv thov ntawm cov pobzeb nplaum thiab cov qauv putty. Cov txheej txheem ntawm RDP polymers cuam tshuam los ntawm lawv qhov loj me, qhov ntom ntom, thiab tawg. Cov me me me me RDP polymers nthuav tawm cov txheej txheem ua tau zoo vim tias lawv tawg sai dua hauv dej, ua rau cov nplaum nplaum los yog cov sib tov sib xyaw. Tsis tas li ntawd, RDP polymers nrog cov tuab tsawg ua pov thawj ua pov thawj kev ua tiav zoo raws li lawv xav tau kev siv zog kom sib xyaw.
Txhawm rau txhim kho kev ua tau zoo, nws raug pom zoo kom siv RDP polymers nrog cov khoom me me thiab qhov ntom ntom ntom. Tsis tas li ntawd, nws raug nquahu kom siv RDP polymers nrog cov dispersibility siab nyob rau hauv dej kom ua tiav sai dua dispersion thiab smoother mix.
nyob rau hauv xaus
Xaiv txoj cai RDP polymer rau cov nplais nplaum thiab cov txheej txheem putty yog qhov tseem ceeb rau kev ua tiav cov khoom zoo. Lub adhesion, cohesion, durability thiab processability ntawm cov polymer cuam tshuam rau kev ua tau zoo ntawm cov khoom. Cov yam tseem ceeb uas yuav tsum tau xav txog thaum xaiv ib qho tsim nyog RDP polymer suav nrog nws cov qauv tshuaj, qhov hnyav molecular, qib ntawm kev sib txuas, iav hloov pauv kub, tiv thaiv dej, cua sov thiab UV degradation, particle loj, bulk ntom thiab dispersion. Ua tib zoo saib xyuas ntawm cov xwm txheej no tuaj yeem ua rau muaj kev pom zoo RDP polymer xaiv thiab zoo dua cov nplais nplaum thiab cov txheej txheem putty.
Post lub sij hawm: Oct-07-2023